Researchers show clean solid–electrolyte/electrode interfaces double capacity of solid-state Li batteries
Scientists at Tokyo Institute of Technology (Tokyo Tech), Tohoku University, National Institute of Advanced Industrial Science and Technology, and Nippon Institute of Technology, have demonstrated by experiment that a clean electrolyte/electrode interface is key to realizing high-capacity solid-state lithium batteries (SSLBs). Their findings could pave the way for improved battery designs with increased capacity, stability, and safety for both mobile devices and electric vehicles. A paper on their work appears in the journal
ACS Applied Materials & Interfaces.
Solid-state lithium batteries comprise solid electrodes and a solid electrolyte that exchange lithium (Li) ions during charging and discharging. Their higher energy density and safety make SSLBs very attractive as next-generation sstorage solutions.
Credit: Taro Hitosugi
Scientists at Tokyo Institute of Technology (Tokyo Tech), Tohoku University, National Institute of Advanced Industrial Science and Technology, and Nippon Institute of Technology, demonstrated by experiment that a clean electrolyte/electrode interface is key to realizing high-capacity solid-state lithium batteries. Their findings could pave the way for improved battery designs with increased capacity, stability, and safety for both mobile devices and electric vehicles.
Liquid lithium-ion batteries are everywhere, being found in the majority of everyday mobile devices. While they possess a fair share of advantages, liquid-based batteries carry notable risks as well. This has become clear to the public in recent years after reports of smartphones bursting into flames due to design errors that caused the battery s liquid electrolyte to leak and catch fire.
2NMO phases during charging and discharging. They also studied the initial distribution of L
2NMO at clean LPO/LNMO interfaces fabricated in a vacuum, as well as the effect of electrode thickness.
Strikingly, the clean interface facilitated the intercalation and deintercalation of Li during charging and discharging of the SSLBs. As a result, the capacity of SSLBs with a clean interface was twice that of conventional LNMO-based batteries. Moreover, this study marked the first time stable reversible reactions were found between the L
NMO and L
2NMO phases in SSLBs.
Assistant Professor Hideyuki Kawasoko of Tohoku University and lead author of the study remarked, “Our findings indicate that the formation of a contamination-free, clean LPO/LNMO interface is key to increasing the capacity of SSLBs while ensuring low interface resistance for fast charging.”
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